added a description for orangepi

added a description for orangepi

README.md

@@ -319,3 +319,38 @@ Upload the firmware to ZUMspot RPi board:
 
     sudo make zumspot-pi
 
+### MMDVM_HS_Dual_Hat\MMDVM_HS_Hat gpio fw update on OrangePI PC/PC Plus
+
+Install the necessary software tools:
+
+    sudo apt-get update
+    sudo apt-get install gcc-arm-none-eabi gdb-arm-none-eabi libstdc++-arm-none-eabi-newlib libnewlib-arm-none-eabi
+
+Download the sources:
+
+    cd ~
+    git clone https://github.com/juribeparada/MMDVM_HS
+    cd MMDVM_HS/
+    git submodule init
+    git submodule update
+
+Install the tools for building fw
+    cd MMDVM_HS/scripts
+    ./install_buildtools.sh
+    
+Copy /MMDVM_HS/configs/MMDVM_HS_Dual_Hat.h or /MMDVM_HS/configs/MMDVM_HS_Hat.h (MMDVM_HS_Hat-12mhz.h) to /MMDVM_HS/Config.h and build the firmware:
+
+    make
+
+Stop the MMDVMHost services:
+
+    sudo systemctl stop mmdvmhost.timer
+    sudo systemctl stop mmdvmhost.service
+
+Upload the firmware to mmdvm_hs_dual_hat (mmdvm_hs_hat) on OrangePi PC\PC Plus:
+
+    sudo make mmdvm_hs_dual_hat_opi (sudo make mmdvm_hs_hat_opi)
+or 
+    sudo /usr/local/bin/stm32flash -v -w bin/mmdvm_f1.bin -g 0x0 -R -i 198,-199,199:-198,199 /dev/ttyS3
+    
+